Agricultural heterocyclic sulfenamides

ABSTRACT

Heterocyclic sulfenamides, such as N-[2-chloro-5-(trifluoromethyl)phenyl]-N-[2,4-dinitro-6-trifluoromethyl)phenyl]-3-nitro-2-pyridinesulfenamide, are useful as miticides, insecticides, fungicides and ovicides.

BACKGROUND OF THE INVENTION

This invention relates to miticidal, insecticidal, fungicidal and ovicidal diarylsulfenamides.

Belgian Pat. No. 826,376 discloses pesticidal diphenylamine derivatives of the formulas: ##STR1## where X and R represent various substituents definitions.

British Pat. No. 1,455,207 discloses a pesticidal diphenylamine of the formula: ##STR2##

Belgian Pat. No. 846,205 discloses compounds with utility as rodenticides of the formula ##STR3## where R, R₁, R₂ and R₃ represent various defined substituents.

Belgian Pat. No. 846,419 discloses compounds with utility as delayed-action rodenticides. ##STR4## where R, R₁, R₂, R₃, R₄ and R₅ represent various defined substituents.

European Pat. No. 156 discloses benzotrifluoride derivatives with insecticidal, acaricidal, nematicidal, insect growth retardant, fungicidal and bactericidal activity. These compounds have the formula ##STR5## where R¹ and R² represent various defined substituents.

European Pat. No. 4642 discloses compounds useful as insecticides, acaricides, nematocides, fungicides and herbicides of the formula ##STR6## where A, B and R represent various defined substituents.

SUMMARY

This invention relates to novel compounds, compositions and methods of use of compounds of Formula I as miticides, insecticides, fungicides and/or ovicides ##STR7## wherein R₁, R₃, and R₄ are independently H, F, Cl, Br, NO₂, CF₃, OCF₂ H, OCF₃, OCF₂ CF₂ H or S(O)_(k) R₈ ; or R₃ and R₄ can be taken together to form --OCF₂ --O or --CF₂ OCF₂ O--;

R₂ is H, F, Cl, Br, NO₂, CF₃ or S(O)_(k) R₈ ;

R₈ is C₁ -C₂ alkyl or C₁ -C₂ alkyl substituted with 2 to 4 atoms of Cl, F or combinations thereof;

k=0, 1 or 2;

R₅ is H, Cl, F, Br or NO₂ ;

R₆ is H, NO₂, or CF₃ ;

R₇ is NO₂ or CF₃ ;

Z is ##STR8## where bonding to sulfur is to the heterocyclic portion of Z and X can be bonded to any ring position;

X is independently H, F, Cl, Br, NO₂, C₁ -C₄ alkyl, C₁ -C₄ alkyl substituted with 2 to 4 atoms of Cl, F or combinations thereof, C₁ -C₄ alkoxy, C₁ -C₄ alkoxy substituted with 2 to 4 atoms of Cl, F or combinations thereof, CN, or NR₁₀ R₁₁ ;

Y is NR₁₂, O or S;

V is H, C₁ -C₄ alkyl, F, Cl, Br;

n is 1, 2, 3 or 4;

p is 1, 2 or 3;

r is 1 or 2;

s is 2 or 3;

t is 1 or 2;

R₁₀, R₁₁ and R₁₂ are C₁ -C₄ alkyl; provided that

(1) at least two of R₁, R₂, R₃, R₄ and R₅ are hydrogen;

(2) no more than two of the substituents R₁, R₂, R₃ and R₄ are simultaneously NO₂ or CF₃ ;

(3) when two NO₂ or two S(O)_(k) R₈ groups are present, they are not ortho to one another;

(4) R₆ and R₇ are not simultaneously CF₃ ;

(5) no more than two of the X substituents are CN, NO₂ or alkoxy;

and further provided that when R₆ is NO₂, then

(a) R₁ is H, F or Cl when R₃ is other than H, F or Cl;

(b) when R₁ =R₃ =R₅, then R₁, R₃ and R₅ are either H or F; and

(c) R₅ is either H or F.

Preferred Compounds

Preferred for reasons of lower cost, lower phytotoxicity and/or greater miticidal, insecticidal, ovicidal and/or fungicidal activity are those compounds of Formula I where independently:

R₁ is F, Cl, Br, CF₃, OCF₂ H, OCF₃, OCF₂ CF₂ H or S(O)_(k) CF₃ ;

R₂ is H, F, Cl or Br;

R₃ is H, F, Cl, Br or S(O)_(k) CF₃ ;

R₄ is F, Cl, Br, CF₃, OCF₃, OCF₂ CF₂ H or S(O)_(k) CF₃ ;

R₆ is NO₂.

More preferred for the same reasons are compounds of Formula I where independently:

R₁ and R₄ are independently Cl, CF₃, OCF₂ H, OCF₃, OCF₂ CF₂ H or S(O)_(k) CF₃ ;

R₃ is H or S(O)_(k) CF₃ ;

R₂ and R₅ are H;

R₆ and R₇ are NO₂.

Separately preferred for reasons of even higher fungicidal, insecticidal, ovicidal and/or miticidal activity and/or high photostability and/or lower cost and/or greater ease of synthesis are those compounds of the more preferred in which ##STR9##

Specifically preferred is the following compound: N-[2-chloro-5-(trifluoromethyl)phenyl]-N-[2,4-dinitro-6-trifluoromethyl)phenyl]-3-nitro-2-pyridinesulfenamide.

Synthesis

The compounds of this invention can be prepared by reacting a diphenylamine of Formula II with sulfenyl chlorides, ClSZ, in the presence of an acid acceptor and an inert solvent as outlined in the following equation: ##STR10## in which R₁, R₂, R₃, R₄, R₅, R₆, R₇, and Z are as previously defined. Organic bases such as N,N-dimethylaniline, triethylamine, trimethylamine, or pyridine or inorganic bases such as sodium or potassium hydroxide sodium or potassium carbonate, or sodium hydride may be used as the acid acceptor. Aprotic solvents such as diethyl ether, tetrahydrofuran (THF), dioxane, methylene chloride, chloroform, or toluene are exemplary of suitable solvents for the reaction. The reaction temperature can be within the range of approximately -40° C. to 80° C., preferably approximately -20° C. to 30° C. Pressure is not critical, for convenience ambient pressure is preferred.

The diphenylamines of Formula II used in the reactions described above can be prepared using procedures taught in Belgian Pat. No. 826,376, United Kingdom Pat. No. 1,455,207, European Patent Application 156, West German Offenlegungsschrift 2,823,168, and European Patent Application 4,642, the disclosures of which are herein incorporated by reference.

The sulfenyl chlorides, ClSZ, used in the preparation of the compounds of Formula I may be prepared from the corresponding heterocyclic thiols or disulfides by any of several methods well known in the art; such methods have been reviewed in Synthesis, 11, 561-580 (1970).

The heterocyclic thiols may be prepared by one of many procedures taught in the literature (for reviews see, "The Chemistry of Heterocyclic Compounds, A Series of Monographs," A. Weissberger, ed.). Representative examples are the reaction of the corresponding halide with metallic hydrosulfides [J. Am. Chem. Soc., 54, 1674 (1932)] or with thiourea followed by alkaline hydrolysis [Or. Synth. Coll Vol. 4, 401, 491, 638 (1963)]. Amino compounds may also be converted into thiols by use of xanthates [J. Am. Chem. Soc., 72 5203 (1950) and Org. Synth. Coll. Vol. 4, 569 (1963)]. The oxidation of thiols to the corresponding disulfides can be carried out by a variety of methods described in the literature ("The Chemistry of the Thiol Group," pt. 2, John Wiley and Sons, Inc., NY, 1974, pp. 785-839 and "Organic Chemistry of Sulfur," S. Oae, ed., Plenum Press, NY, 1977, pp 155-160).

The following examples further illustrate the preparation of compounds of Formula I. In the examples, all parts are by weight and temperatures are in degrees centrigrade unless otherwise indicated.

EXAMPLE 1 N-[2-Chloro-5-(trifluoromethyl)phenyl]-N-[2,4-dinitro-6-trifluoromethyl)phenyl]-3-nitro-2-pyridinesulfenamide.

A 50% dispersion of sodium hydride in mineral oil (0.58 g, 0.012 mol) was washed with hexane and then slurried in anhydrous THF (10 ml) under a nitrogen atmosphere. A solution of N-[2-chloro-5-(trifluoromethyl)phenyl]-2,4-dinitro-6-(trifluoromethyl)benzenamine (4.3 g, 0.010 mol) in dry THF (20 mol) was added dropwise at room temperature. The deep-red solution was stirred at room temperature for 0.5 hour and then cooled to 0°. A solution of 3-nitro-2-pyridinesylfenyl chloride [1.90 g, 0.010 mol, Chem. Lett. 951 (1978)] in dry dichloromethane (35 ml) was added dropwise producing a yellow-orange solution. The reaction mixture was stirred at 0° for 1 hour and then diluted with dichloromethane (300 ml). Water (1-2 ml) was cautiously added to destroy excess sodium hydride. The organic layer was washed with water (until neutral), dried (Na₂ SO₄), filtered and concentrated in vacuo to yield an orange oil/solid. Purification by dry column chromatography (silica gel, hexane/1-chlorobutane 1:4) gave N-[2-chloro-5-(trifluoromethyl)phenyl]-N-[2,4-dinitro-6-trifluoromethyl)phenyl]-3-nitro-2-pyridinesulfenamide as a yellow-orange glass: mp 71°-74°; NMR (CDCl₃) δ 7.2-8.0 (m, 4H, Ar-H), 8.4-8.8 (m, 3.7H, Ar-H); IR(CCl₄) 1580, 1530, 1510, 1390, 1330, 1290, 1170, 1140 and 1080 cm^(-').

EXAMPLE 2 N-[2-Chloro-5-(trifluoromethyl)phenyl]-N-[2,4-dinitro-6-trifluoromethyl)phenyl]-2-benzothiazolesulfenamide.

The sulfenylated diphenylamine was prepared from N-[2-chloro-5-(trifluoromethyl)phenyl]-2,4-dinitro-6-(trifluoromethyl)benzenamine (4.3 g, 0.010 mol) in dry THF (20 ml), 2-benzothiazolesulfenyl chloride [2.0 g, 0.010 mol, Zh. Obshch. Khim. 45, 1127 (1975)] in carbon tetrachloride (45 ml) and 50% NaH (0.53 g, 0.011 mol) as outlined in Example 1 with the following exception: the reaction mixture was stirred at 0° for 3 hours and then at room temperature for 16 hours. Purification by dry column chromatography (silica gel, hexane/ethyl acetate, 8.5/1.5) gave N-[2-chloro-5-(trifluoromethyl)-phenyl]-N-[2,4-dinitro-6-trifluoromethyl)phenyl]-2-benzothiazolesulfenamide as a red-orange glass: mp 46°-53°; NMR (CDCl₃) δ 7.20-8.25 (m, 7H, Ar-H), 8.8-9.05 (AB quartet, 1.6H, Ar-H); IR(KBr) 1600, 1540, 1500, 1330, 1270, 1170, 1150, 1130 and 1070 cm⁻¹.

Procedures described in Examples 1 and 2 may be used to prepare the compounds in Tables 1-4.

                                      TABLE 1                                      __________________________________________________________________________      ##STR11##                                                                     __________________________________________________________________________     R.sub.1                                                                               R.sub.2 R.sub.3                                                                               R.sub.4                                                                               R.sub.5                                                                           R.sub.6                                                                           R.sub.7                                                                           m.p. (C.°)                        __________________________________________________________________________     Cl     H       H      CF.sub.3                                                                              H  NO.sub.2                                                                          NO.sub.2                                                                          71-74°                            Cl     H       H      Cl     H  NO.sub.2                                                                          NO.sub.2                                    Cl     H       H      CF.sub.3                                                                              H  H  NO.sub.2                                    Cl     H       H      CF.sub.3                                                                              H  NO.sub.2                                                                          CF.sub.3                                    Cl     H       H      CF.sub.3                                                                              H  CF.sub.3                                                                          NO.sub.2                                    Cl     H       H      CF.sub.3 O                                                                            H  NO.sub.2                                                                          NO.sub.2                                    Cl     H       H      CHF.sub.2 CF.sub.2 O                                                                  H  NO.sub.2                                                                          NO.sub.2                                    Cl     H       H      CH.sub.3 S                                                                            H  NO.sub.2                                                                          NO.sub.2                                    Cl     H       H      CHCl.sub.2 CCl.sub.2 S                                                                H  NO.sub.2                                                                          NO.sub.2                                    Cl     H       H      CF.sub.3 SO.sub.2                                                                     H  NO.sub.2                                                                          NO.sub.2                                    Cl     H       H      C.sub.2 H.sub.5 S                                                                     H  NO.sub.2                                                                          NO.sub.2                                    CF.sub.3 O                                                                            H       H      Cl     H  NO.sub.2                                                                          NO.sub.2                                    CHF.sub.2 CF.sub.2 O                                                                  H       H      Cl     H  NO.sub.2                                                                          NO.sub.2                                    CHCl.sub.2 CCl.sub.2 S                                                                H       H      Cl     H  NO.sub.2                                                                          NO.sub.2                                    CF.sub.3 S                                                                            H       H      H      H  NO.sub.2                                                                          NO.sub.2                                    CH.sub.3 SO.sub.2                                                                     H       H      H      H  NO.sub.2                                                                          NO.sub.2                                    CF.sub.3                                                                              H       H      H      H  NO.sub.2                                                                          NO.sub.2                                    H      H       CF.sub.3 S                                                                            H      H  NO.sub.2                                                                          NO.sub.2                                    H      H       CHF.sub.2 CF.sub.2 O                                                                  H      H  NO.sub.2                                                                          NO.sub.2                                    H      H       CH.sub.3 S                                                                            H      H  NO.sub.2                                                                          NO.sub.2                                    H      H       C.sub.2 H.sub.5 SO.sub.2                                                              H      H  NO.sub.2                                                                          NO.sub.2                                    H      CF.sub.3                                                                               Cl     H      H  NO.sub.2                                                                          NO.sub.2                                    Cl     H       Cl     H      H  NO.sub.2                                                                          NO.sub.2                                    H      Br      H      H      H  NO.sub.2                                                                          NO.sub.2                                    F      H       F      H      F  NO.sub.2                                                                          NO.sub.2                                    H      H       Cl     H      H  NO.sub.2                                                                          NO.sub.2                                    Cl     H       H      NO.sub.2                                                                              H  NO.sub.2                                                                          NO.sub.2                                    H      NO.sub.2                                                                               H      H      F  NO.sub.2                                                                          NO.sub.2                                    H      Cl      Cl     H      H  NO.sub.2                                                                          NO.sub.2                                    H      F       H      H      F  NO.sub.2                                                                          NO.sub.2                                    H      CHF.sub.2 CF.sub.2 S                                                                   H      H      H  NO.sub.2                                                                          NO.sub.2                                    H      CHF.sub.2 CF.sub.2 SO.sub.2                                                            H      H      H  NO.sub.2                                                                          NO.sub.2                                    H      CH.sub.3 S                                                                             H      H      H  NO.sub.2                                                                          NO.sub.2                                    Cl     H       CF.sub.3 O                                                                            H      H  NO.sub.2                                                                          NO.sub.2                                    Br     H       Br     H      H  H  NO.sub.2                                    Cl     H       NO.sub.2                                                                              H      H  NO.sub.2                                                                          NO.sub.2                                    NO.sub.2                                                                              H       Cl     H      H  NO.sub.2                                                                          NO.sub.2                                    H      H       H      F      H  NO.sub.2                                                                          NO.sub.2                                    H      H       H      Br     H  NO.sub.2                                                                          NO.sub.2                                    F      H       F      H      F  CF.sub.3                                                                          NO.sub.2                                    H      H       CF.sub.3                                                                              H      H  NO.sub.2                                                                          NO.sub.2                                    H      H       Cl     H      Cl CF.sub.3                                                                          NO.sub.2                                    H      H       H      H      NO.sub.2                                                                          CF.sub.3                                                                          NO.sub.2                                    H      Br      H      H      Br CF.sub.3                                                                          NO.sub.2                                    Cl     H       H      CF.sub.2 HO                                                                           H  NO.sub.2                                                                          NO.sub.2                                    Cl     H       OCF.sub.2 O    H NO.sub.2                                                                          NO.sub.2                                    Cl     H       OCF.sub.2 OCF.sub.2                                                                          H  NO.sub.2                                                                          NO.sub.2                                    __________________________________________________________________________

                  TABLE 2                                                          ______________________________________                                          ##STR12##                                                                     Z              X              mp(°C.)                                   ______________________________________                                          ##STR13##     H 4-NO.sub.2 5-NO.sub.2 6-NO.sub.2 4-Cl 5-CN 3,5-di                            NO.sub.2 3,4,5,6-tetra Cl 3,5-di CN                              ##STR14##     H 2-Cl, 5-NO.sub.2 2-CH.sub.3 6-CH.sub.3 O 2,4-di CH.sub.3                     -N(CH.sub.3).sub.2 2-Cl, 6-Br                                    ##STR15##     H 2,3,5,6-tetra Cl 2,3,5,6-tetra F 2,6-di CH.sub.3,                            3-NO.sub.2 3,5-di CF.sub.3 O                                    ______________________________________                                    

                  TABLE 3                                                          ______________________________________                                          ##STR16##                                                                     Z              X                mp(C.°)                                 ______________________________________                                          ##STR17##     H 5-Cl 6-OC.sub.2 H.sub.5 4-CH.sub.3 6-NO.sub.2 6-OMe                          5,6-di Cl 4,6-di NO.sub.2 4-CN, 7-N(C.sub.2 H.sub.5).sub.2                                      46-53                                           ##STR18##     H 4,5,6-tri Cl 5,6-di CN                                         ##STR19##     4-C.sub.4 H.sub.9 H 5,6-di Br                                    ##STR20##     H 4-CH.sub.3 4,6-di CH.sub.3 4,6-di CF.sub.3 4-CH.sub.3 O,                     5-NO.sub.2, 6-CH.sub.3                                           ##STR21##     H 5-NO.sub.2                                                     ##STR22##     H 2-C(CH.sub.3).sub.3                                            ##STR23##     H 4,5-di Cl                                                      ##STR24##     H 3,6-di CH.sub.3                                                ##STR25##     H 3-Cl, 6-NO.sub.2 3-CCl.sub.3 CH.sub.2                          ##STR26##     H 5,7-di C.sub.2 H.sub.5 3-nitro                                 ##STR27##     H 6-Br 2-Cl, 4-Me                                                ##STR28##     H 7-N(C.sub.4 H.sub.9).sub.2 3-CN                                ##STR29##     H 4-NO.sub.2 5-OC.sub.4 H.sub.9, 7-Cl                            ##STR30##     H 1-Cl 4,6-di NO.sub.2                                           ##STR31##     H 6,7-di F                                                       ##STR32##     H 4-CH.sub.3 3-NO.sub.2                                          ##STR33##     H 2-Cl 2,5-di CH.sub.3                                           ##STR34##     H 5-CF.sub.3 CH.sub.2                                            ##STR35##     H 2-NO.sub.2                                                     ##STR36##     H 3-C.sub.2 H.sub.5                                              ##STR37##     H 4-CN                                                           ##STR38##     H 4-CH.sub.3 O, 6-C.sub.3 H.sub.7 3-CF.sub.3                     ##STR39##     H 2-CH.sub.3, 4-NO.sub.2                                         ##STR40##     H 3-Cl, 6-CCl.sub.3                                              ##STR41##     H 4-CHF.sub.2 CF.sub.2                                           ##STR42##     H 4,6-di NO.sub.2 5,6-CCl.sub.3 O                                ##STR43##     H 2-(CH.sub.3).sub.2 CH 6-CN                                     ##STR44##     H  4-NO.sub.2, 6-N(CH.sub.3).sub.2                               ##STR45##     H 5-CF.sub.3 CH.sub.2 CH.sub.2 6,7-di Cl                         ##STR46##     H 4-NO.sub.2, 6-CN                                               ##STR47##     H 2-CHF.sub.2 CF.sub.2                                           ##STR48##     H 5-CF.sub.3 CH.sub.2 O 6-(CH.sub.3).sub.3 CO                    ##STR49##      H 3-Cl, 4-CN                                                    ##STR50##     H 3-CCl.sub.2 F                                                  ##STR51##     H 5-NO.sub.2 4-CN                                                ##STR52##     H 3-F 4-CH.sub.3                                                 ##STR53##     H 3-NO.sub.2                                                     ##STR54##     H 4-CH.sub.3 CH.sub.2 CH.sub.2 O 5-CCl.sub.3                     ##STR55##     H 5-CN                                                           ##STR56##     H 3-Cl                                                           ##STR57##     H 3,4-di CH.sub.3 O 3-CN                                         ##STR58##     H 2-NO.sub.2                                                     ##STR59##     H 5-Br                                                           ##STR60##     H 4-CF.sub.3 CH.sub.2 O                                          ##STR61##     H 2-N(C.sub.3 H.sub.7).sub.2                                     ##STR62##     H                                                                ##STR63##     H 4,5-di C.sub.2 H.sub.5 4-Cl                                    ##STR64##      H 4-C(CH.sub.3).sub.3                                           ##STR65##     H 2-NO.sub.2                                                     ##STR66##     H 5-F                                                            ##STR67##     H 4,6-di CF.sub.3 O 6,7-di Br                                    ##STR68##     H 5-Cl 5,6-di CH.sub.3 (CH.sub.2).sub.3                          ##STR69##     H 4-Br, 5-CF.sub.3 O                                             ##STR70##     H 3,5-di Cl                                                      ##STR71##     H 3-C.sub.2 H.sub.5                                              ##STR72##     H 5-NO.sub.2 6-CN                                                ##STR73##     H 4,6-di NO.sub.2 4-CH.sub.3, 6-CF.sub.3 CH.sub.2 O              ##STR74##     H 6,7-di CCl.sub.3 CH.sub.2 5-NO.sub.2, 7-CH.sub.3                             CH.sub.2 CH.sub.2 O                                              ##STR75##     H 6-Br, 7-CH.sub.3 CH.sub.2                                      ##STR76##     H 3-(CH.sub.3).sub.3 C                                           ##STR77##     H 5-Cl                                                           ##STR78##     H                                                                ##STR79##     H 5-NO.sub.2 5-Br                                                ##STR80##     H 3-CF.sub.3                                                     ##STR81##     H 5-CN                                                           ##STR82##     H 4-CF.sub.2 HCCl.sub.2                                          ##STR83##     H 5-N(CH.sub.3).sub.2                                            ##STR84##     H                                                                ##STR85##     H 5-C.sub.2 H.sub.5 O                                            ##STR86##     H 4-CF.sub.3 CH.sub.2 O                                          ##STR87##     H 5-CN 5-Cl                                                      ##STR88##     H                                                                ##STR89##     H 4-CN                                                           ##STR90##                                                                                    H 4-Br 4-NO.sub.2                                                ##STR91##     H 5-F 5-CCl.sub.3 CH.sub.2 O                                     ##STR92##     H 5-CH.sub.3 CH.sub.2 CH.sub.2                                   ##STR93##     H 5-NO.sub.2                                                     ##STR94##     H 5,6-di CH.sub.3                                                ##STR95##     --                                                               ##STR96##     --                                                               ##STR97##     --                                                               ##STR98##     --                                                         

                  TABLE 4                                                          ______________________________________                                          ##STR99##                                                                     z              V               mp(°C.)                                  ______________________________________                                          ##STR100##    H 4,5-di CH.sub.3 4,4-di CH.sub.3                                ##STR101##    H 4-Cl 5,5-di C.sub.2 H.sub.5                                    ##STR102##    H 4-(CH.sub.3).sub.3 C 4-CH.sub.3, 5-Br                          ##STR103##    H                                                                ##STR104##    H                                                                ##STR105##    H 4-CH.sub.3 (CH.sub.2).sub.3, 6-Br                              ##STR106##    H 3,4-di CH.sub.3                                                ##STR107##    H 3,4-di Cl 3,4-di CH.sub.3                                      ##STR108##    H 4-C.sub.2 H.sub.5, 7-Cl 5-Cl, 6-Br                            ______________________________________                                    

Formulation

Useful formulations of the compounds of Formula (I) can be prepared in conventional ways. They include dusts, solutions, suspensions, emulsions, wettable powders, emulsifiable concentrates and the like. Many of these may be applied directly to the plant. Sprayable formulations can be extended in suitable media and used at spray volumes of from a few pints to several hundred gallons per acre. High-strength compositions are primarily used as intermediates for further formulation. The formulations, broadly, contain about 1% to 99% by weight of active ingredient(s) and at least one of (a) about 0.1% to 20% surfactant(s) and (b) about 1% to 99% solid or liquid diluent(s). More specifically, they will contain these ingredients in the following approximate proportions:

    ______________________________________                                                     Percent by Weight                                                              Active                                                                         Ingredient                                                                             Diluent(s)                                                                               Surfactant(s)                                    ______________________________________                                         Wettable Powders                                                                             20-90      0-74     1-10                                         Oil Suspensions,                                                                              5-50     40-95     0-15                                         Emulsions, Solutions                                                           (including Emulsifi-                                                           able Concentrates)                                                             Aqueous Suspensions                                                                          10-50     40-84     1-20                                         Dusts          1-25     70-99     0-5                                          Granules and Pellets                                                                          1-95      5-99     0-15                                         High-Strength 90-99      0-10     0-2                                          Compositions                                                                   ______________________________________                                    

Lower or higher levels of active ingredient can, of course, be present depending on the intended use and the physical properties of the compound. Higher ratios of surfactant to active ingredient are sometimes desirable, and are achieved by incorporation into the formulation or by tank mixing.

Typical solid diluents are described in Watkins, et al., "Handbook of Insecticide Dust Diluents and Carriers", 2nd, Edn., Dorland Books, Caldwell, N.J. The more absorptive diluents are preferred for wettable powders and the denser ones for dusts. Typical liquid diluents and solvents are described in Marsden, "Solvents Guide", 2nd. Edn., Interscience, New York, 1950. Solubility under 0.1% is preferred for suspension concentrates; solution concentrates are preferably stable against phase separation at 0° C. "McCutcheon's Detergents and Emulsifiers Annual", MC Publishing Co., Ridgewood, New Jersey, as well as Sisely and Wood, "Encyclopedia of Surface Active Agents", Chemical Publ. Co., Inc., New York, 1964, list surfactants and recommended uses. All formulatiosn can contain minor amounts of additives to reduce foam, caking, corrosion, microbiological growth, promote sticking, etc. Preferably, ingredients should be approved by the U.S. Environmental Protection Agency for the use intended.

The methods of making such compositions are well known. Solutions are prepared by simply mixing the ingredients. Fine solid compositions are made by blending and, usually, grinding as in a hammer or fluid energy mill. Suspensions are prepared by wet milling (see, for example, Littler, U.S. Pat. No. 3,060,084).

For further information regarding the art of formulation, see for example:

J. B. Buchanan, U.S. Pat. No. 3,576,834, Apr. 27, 1971, Col, 5, Line 36 through Col. 7, Line 70 and Ex. 1-4, 17, 106, 123-140;

R. R. Shaffer, U.S. Pat. No. 3,560,616 Feb. 2, 1971, Col. 3, Line 48 through Col. 7, Line 26 and Examples 3-9, 11-18;

E. Somers, "Formulation", Chapter 6 in Torgeson, "Fungicides", Vol, I, Academic Press, New York, 1967.

EXAMPLE 3

    ______________________________________                                         Wettable Powder                                                                ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                      methyl)phenyl]-N-[2,4-                                                         dinitro-6-(trifluoro-                                                          methyl)phenyl]-3-nitro-                                                        2-pyridinesulfenamide     40%                                                  Dioctyl sodium sulfosuccinate                                                                            1.5%                                                 Sodium ligninsulfonate    3%                                                   Low-viscosity methyl cellulose                                                                           1.5%                                                 Kaolinite                 54%                                                  ______________________________________                                    

The ingredients are thoroughly blended, passed through an air mill to produce an average particle size under 15 microns, reblended, and sifted through a U.S.S. No. 50 sieve (0.3 mm opening) before packaging.

All compounds of the invention may be formulated in the same manner, and dispersed in water for application.

EXAMPLE 4

    ______________________________________                                         Wettable Powder                                                                ______________________________________                                         N-[2-chloro-5-(trifluoromethyl)-                                               phenyl]-N-[2,4-dinitro-6-(tri-                                                 flouromethyl)phenyl]-2-benzo-                                                  thiazolesulfenamide       30%                                                  Sodium alkylnaphthalenesulfonate                                                                         2%                                                   Sodium ligninsulfonate    2%                                                   Synthetic amorphous silica                                                                               3%                                                   Kaolinite                 63%                                                  ______________________________________                                    

The ingredients are combined in an efficient blender, passed through a hammer mill to produce particles below 40 microns, and then reblended. The product is sifted through a U.S.S. No. 50 sieve (0.3 mm openings) before packaging.

EXAMPLE 5

    ______________________________________                                         Dust                                                                           ______________________________________                                         Wettable powder of Example A                                                                             10%                                                  Pyrophyllite (powder)     90%                                                  ______________________________________                                    

The wettable powder and the pyrophyllite diluent are thoroughly blended and then packaged. The product is suitable for use as a dust.

EXAMPLE 6

    ______________________________________                                         Aqueous Suspension                                                             ______________________________________                                         N-[2-chloro-5-(trifluoromethyl)-                                               phenyl]-N-[2,4-dinitro-6-                                                      (trifluoromethyl)phenyl]-3-                                                    nitro-2-pyridinesulfenamide                                                                             25%                                                   Hydrated attapulgite     3%                                                    Crude calcium ligninsulfonate                                                                           10%                                                   Sodium dihydrogen phosphate                                                                             0.5%                                                  Water                    61.5%                                                 ______________________________________                                    

The ingredients are ground together in a sand mill until the solid particles have been reduced to diameters under 10 microns. The product may be diluted with water for spray application.

EXAMPLE 7

    ______________________________________                                         Solution                                                                       ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                      methyl)phenyl]-N-[2,4-                                                         dinitro-6-(trifluoro-                                                          methyl)phenyl]-2-benzo-                                                        thiazolesulfenamide      30%                                                   Dimethylformamide        70%                                                   ______________________________________                                    

The ingredients are combined and stirred to produce a solution, which can be used for low volume applications.

EXAMPLE 8

    ______________________________________                                         Granule                                                                        ______________________________________                                         Wettable powder of Example A                                                                             15%                                                  Gypsum                    69%                                                  Potassium sulfate         16%                                                  ______________________________________                                    

The ingredients are blended in a rotating mixer and water sprayed on to accomplish granulation. When most of the material has reached the desired range of 1.0 to 0.42 mm (U.S.S. No. 18 to 40 sieves), the the material is crushed to produce additional material in the desired range. These granules contain 6.0% active ingredient.

Utility

The compounds of this invention may be used in several ways. First, they are active as miticides and mite ovicides and may be used to protect plants from damage caused by these pests. More specifically, fruits, field crops, vegetables and ornamentals can be protected.

When mite eggs or mites come into contact with the compounds of this invention, either in the form of direct spray or in the case of motile forms by walking over treated surfaces, they are killed if they have been exposed to a sufficiently high dosage. While most plants are able to tolerate the presence of very small numbers of mites without adverse effect, the reproductive capacity of these pests is enormous. Generally, mite populations rapidly build up, easily out-stripping parasite and predator capabilities for control. Growers noting rapid mite build-up must take immediate action to prevent damage to economically important crops.

The method of this invention, namely, contacting mites or mite eggs with an effective concentration, is a most desirable method for control of these pests. This may be accomplished by applying an effective amount of a compound of this invention to the locus of infestation, to the area to be protected or to the pests themselves.

The quantity of compound needed for miticidal activity will vary depending on the specific situation; generally, a very small quantity is required. Among the variables that must be considered in deciding on the quantity of chemical to be used are the specific compound itself, the specific mite to be controlled, weather conditions, the type of crop, the stage of development of the crop, the volume of spray applied, population pressure, and the interval between applications. For plant protection, solutions or suspensions contain as little as 2.5 ppm of active ingredient in a spray solution may prove effective in a given set of circumstances. For field usage, however, in high-volume applications, aqueous spray preparations containing 5-2500 ppm of active ingredient are generally useful. Preferred are suspensions containing 20-500 ppm, and most preferred are those containing 80-320 ppm. On an area basis, in general, 0.03 to 5.5 kilograms of active ingredient per hectare are acceptable, preferably 0.03 to 3 kilograms, and most preferably, 0.06 to 2 kg. When applied in an orchard, spraying is continued until run-off is observed.

The compounds are especially suited for the protection of living plants such as fruit-bearing trees, nut-bearing trees, ornamental trees, forest trees, vegetable crops, horticultural crops (including ornamentals, small fruits and berries) and grain and seed crops. Apple trees, peach trees, cotton, citrus trees, bean and peanuts are particularly susceptible to mite damage and can be protected by application of the compounds of this invention. To assure control throughout the growing season (e.g., June through August in the Northern Hemisphere) multiple applications at desired intervals can be utilized.

Many species of mites are controlled by the compounds of this invention. The following is a list of representative susceptible mites along with the types of damage that they can cause: Panonychus ulmi (European red mite) and Tetranychus urticae (two-spotted mite) which are commonly called "orchard mites", and which attack a great many deciduous trees, such as apple, pear, cherry, plum and peach trees; Tetranychus atlanticus (Atlantic or strawberry mite), T. cinnabarinus (carmine spider mite) and T. pacificus (Pacific mite); which attack cotton and numerous other crop plants; Paratetranychus citri (citrus red mite) and others which attack citrus; Phyllocoptruta oleivora which causes citrus rust; Byrobia praetiosa (clover mite) which attacks clover, alfalfa and other crops; and Aceria Neocynodomis which attacks grasses and other plants.

The compounds of this invention are useful for the control of insects throughout their various development stages. The insects or insect eggs are controlled by applying the material in a convenient formulation to the locus of infestation, to the area to be protected, or to the pests themselves. For the control of insects in agricultural crops, the compound is generally applied to the foliage or other plant parts which are to be protected. Effective amounts to be applied depend on the species to be controlled, its life stage, its size and location and other variables. In general, 0.1 to 10 kg/ha may be required for insect control in agriculture with rates of 0.25 to 4 kg/ha usually being sufficient. Preferable rates in large scale operations are in the range of 0.3 to 2 kg/ha.

The insect species that may be controlled during their various developmental stages by the insecticidal action of the compounds of this invention include, but are not limited to, Spodoptera exigua (beetarmyworm), Spodoptera eridania (southern armyworm), Spodoptera frugiperda (fall armyworm), Heliothis zea (bollworm), Heliothis virescens (tobacco budworm), and Trichoplusia ni (cabbage looper).

These compounds are especially useful for controlling adult mosquitos, mosquito larvae, and ticks including, but not limited to, Rhipicephalus sanguineus (brown dog tick) and Dermacentor variabiles (American dog tick).

Motile stages of insects that may be controlled include, but are not limited to, Aphis fabae (bean aphid), Myzus persicae (green peach aphid), Melanopus femurrubrum (redlegged grasshopper), and Musca domestica (house fly).

EXAMPLE 9

Test units consisted of plant pots containing two red kidney bean plants in the two-leaf stage per pot. The plants were infested with two spotted mites and sprayed to run-off with dispersions of N-[2-chloro-5-(trifluoromethyl)phenyl]-N-[2,4-dinitro-6-(trifluoromethyl)phenyl]-3-nitro-2-pyridinesulfenamide at the indicated concentrations. Dispersions were made by dissolving weighed quantities of the active ingredients in 10 ml of acetone and then diluting to volume with water containing 1:3000 of a surfactant, DuPonol® (a tradename of E. I. du Pont de Nemours & Co. for sodium alcohol sulfonate). Mortality was evaluated two days after spraying.

                  TABLE 5                                                          ______________________________________                                                         % Spray      % Mortality                                       Compound        Concentration                                                                               (2 days)                                          ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                                      0.00025      100                                               methyl)phenyl]-N-[2,4-                                                         dinitro-6-(trifluoro-                                                          methyl)phenyl]-3-nitro-                                                        2-pyridinesulfenamide                                                          ______________________________________                                    

EXAMPLE 10

Twenty-five house fly adults are secured in screened stainless steel ring cages and treated with acetone dispersions of N-[2-chloro-5-(trifluoromethyl)-phenyl]-N-[2,4-dinitro-6-(trifluoromethyl)phenyl]-3-nitro-2-pyridinesulfenamide at the indicated concentrations. The stock dispersion is prepared by dissolving appropriately weighed quantities of active ingredient in predetermined quantities of acetone. Further diluting with acetone yields the desired concentrations. After treating, the units are kept in a room maintained at 25°±2° C., 50% RH. Results are recorded at the end of 1 day.

    ______________________________________                                         Compound       Concentration % Mortality                                       ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                                     .01           90                                                methyl)phenyl]-N-[2,4-di-                                                      nitro-6-(trifluoro-                                                            methyl)phenyl]-3-nitro-                                                        2-pyridinesulfenamide                                                          ______________________________________                                    

The compounds of this invention are also useful as plant disease control agents. They are effective for the control of a broad spectrum of plant diseases as represented by, but not limited to, soil-borne fungal pathogen Rhizoctonia solani, foliar pathogens, Puccinia graminis, Erisyphe cichoracearum, Venturia inaequalis and Phytophthora infestans, and the seed-borne fungus Helminthosporium oryzae. Diseases of a wide variety of ornamental, vegetable, cereal and fruit crops are controlled by the compounds of this invention.

Disease control is accomplished by applying the compound to the portion of the plant to be protected, such as the roots, stems, foliage, fruit, seeds, tubers or bulbs, or to the media (soil or sand) in which the plants to be protected are growing. The compound may also be applied to the seed from which the plants to be protected are to be grown.

Rates of application for these compounds will be influenced by many factors of the environment and must be determined under use conditions. Foliage can normally be protected when treated at a rate of from 1 to 500 ppm of active ingredient. Plants growing in soil treated at a concentration of from 0.1 to about 20 kg/ha can be protected from disease. Seed and seedlings can normally be protected when seed is treated at a rate of from 0.06 to about 3 grams per kilogram of seed.

EXAMPLE 11

Rice seed infected with Helminthosporium oryzae are treated with compounds of this invention at a rate of 1.3 g per kilogram of seed. This is accomplished by soaking infected seed for 1 minute in a suspension of the indicated compound dissolved in a solution containing 4% glycerine, 4% water, 0.02% Tween®20*, and 92% acetone. Treated seeds are placed on moist blotters and enclosed in plastic bags for 18 days at which time disease ratings are made based on percent germination. As shown in the following table, a compound of this invention provided excellent disease control as treated seed had a high percentage germination in contrast to untreated seed which did not germinate. Phytotoxicity in the form of growth reduction was observed on some germination seedlings in assolication with disease control.

    ______________________________________                                                              % Control of rice                                                              Helminthosporium                                                               in a seed treat-                                          Compound             ment test                                                 ______________________________________                                         N-[2-chloro-5-(trifluoromethyl)-                                                                        90    (G)                                             phenyl]-N-[2,4-dinitro-6-                                                      (trifluoromethyl)phenyl]-3-                                                    nitro-2-pyridinesulfenamide                                                    N-[2-chloro-5-(trifluoromethyl)-                                                                        0                                                     phenyl]-N-[2,4-dinitro-6-                                                      (trifluoromethyl)phenyl]-2-                                                    benzothiazolesulfenamide                                                       ______________________________________                                          *G = growth reduction.                                                   

EXAMPLE 12

Rhizoctonia solani-infested soil was placed in a 900 cc cup. Compounds of this invention were mixed at a rate of 15 kg/ha in a section 2" wide×2" deep×4" long to simulate an in-the-row application. Five cotton seeds were planted in the treated soil. After 8 days, the cotton plants were removed and rated for disease control. Phytotoxicity in the form of growth reduction was observed on some of the plants in association with disease control.

    ______________________________________                                                             % Rhizoctonia                                              Compounds           solani control                                             ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                                              100    (G)                                             methyl)phenyl]-N-2,4-                                                          dinitro-6-(trifluoro-                                                          methyl)phenyl]-3-nitro-                                                        2-pyridinesulfenamide                                                          N-[2-chloro-5-(trifluoro-                                                                              50                                                     methyl)phenyl]-N-[2,4-                                                         dinitro-6-(trifluoro-                                                          methyl)phenyl]-2-benzo-                                                        thiazolesulfenamide                                                            ______________________________________                                          (G) = growth reduction                                                   

EXAMPLE 13

Compounds of this invention are dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 20 ppm in purified water containing 25 ppm of the surfactant Alkanol® XC (sodium alkyl naphthalene sulfonate). This suspension is sprayed to the point of run-off on apple seedlings. The following day, the plants are inoculated with a spore suspension of the fungus Venturia inaequalis and incubated in a growth room for 10-12 days. Disease ratings are then made. As shown in the following table, the compounds of this invention provided excellent disease control, as treated plants had reduced numbers of apple scab lesions in contrast to untreated plants which were covered with scab lesions. Phytotoxicity in the form of foliar burn was observed on some of the plants in association with disease control.

    ______________________________________                                                           % Control Apple Scab                                         Compounds         in a Preventive Test                                         ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                                             100    (B)                                              methyl)phenyl]-N-[2,4-                                                         dinitro-6-(trifluoro-                                                          methyl)phenyl]-3-nitro-                                                        2-pyridinesulfenamide                                                          N-[2-chloro-5-(trifluoro-                                                                             43                                                      methyl)phenyl]-N-[2,4-                                                         dinitro-6-(trifluoro-                                                          methyl)phenyl]-2-benzo-                                                        thiazolesulfenamide                                                            ______________________________________                                          (B) = burn                                                               

EXAMPLE 14

Compounds of this invention are dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 20 ppm in purified water containing 25 ppm of the surfactant Alkanol® XC (sodium alkyl naphthalene sulfonate). This suspension is sprayed to the point of run-off on apple seedlings. The following day, 1/2 inch of simulated rainfall is applied to the foliage of the plants. When the foliage is dry, the plants are inoculated with a spore suspension of the fungus Venturia inaequalis and incubated in a growth room for 10-12 days. Disease ratings are then made. As shown in the following table, the compounds of this invention provided excellent disease control, as treated plants had reduced numbers of apple scab lesions in contrast to untreated plants which were covered with scab lesions. Phytotoxicity in the form of foliar burn was observed on some of the plants in association with disease control.

    ______________________________________                                                             % Control of Apple                                                             Scab in a Residual                                         Compounds           Wash-Off Test                                              ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                                               100    (B)                                            methyl)phenyl]-N-[2,4-                                                         dinitro-6-(trifluoro-                                                          methyl)phenyl]-3-nitro-                                                        2-pyridinesulfenamide                                                          N-[2-chloro-5-(trifluoro 43                                                    methyl)phenyl]-N-[2,4-                                                         dinitro-6-(trifluoro-                                                          methyl)phenyl]-2-benzo-                                                        thiazolesulfenamide                                                            ______________________________________                                          (B) = burn                                                               

EXAMPLE 15

Compounds of this invention are dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 20 ppm in purified water containing 25 ppm of the surfactant Alkanol® XC (sodium alkyl naphthalene sulfonate). This suspension is sprayed to the point of run-off on apple seedlings. When the foliage is dry, the plants are exposed to 3500 foot candles of light from a xenon arc source for a period of 16 hours. This light source approximates the spectrum of natural sunlight, and is used to assess photostability of the compounds of this invention on plant foliage. The following day, the plants are inoculated with a spore suspension of the fungus Venturia inaequalis and incubated in a growth room for 10-12 days. Disease ratings are then made. As shown in the following table, most of the compounds of this invention provided good disease control as the treated plants had fewer apple scab lesions in contrast to untreated plants which were covered with scab lesions. Phytotoxicity in the form of foliar burn was observed on some of the plants in association with disease control.

    ______________________________________                                                              % Control Apple                                                                Scab in a Photo-                                          Compounds            stability test                                            ______________________________________                                         N-[2-chloro-5-(trifluoromethyl)                                                                        70    (B)                                              phenyl]-N-[2,4-dinitro-6-(tri-                                                 fluoromethyl)phenyl]-3-nitro-                                                  2-pyridinesulfenamide                                                          N-[2-chloro-5-(trifluoromethyl)-                                                                       15                                                     phenyl]-N-[2,4-dinitro-6-(tri-                                                 fluoromethyl)phenyl]-2-benzo-                                                  thiazolesulfenamide                                                            ______________________________________                                          (B) = burn                                                               

EXAMPLE 16

Compounds of this invention are dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 20 ppm in purified water containing 25 ppm of the surfactant Alkanol® XC (sodium alkyl naphthalane sulfonate). This suspension is sprayed to the point of run-off on cucumber seedlings. The following day, the plants are inoculated with a spore suspension of the fungus Erysiphe cichoracearum and incubated in a growth room for 7 days. Disease ratings are then made. As shown in the following table, the compounds of this invention provided excellent disease control, as treated plants had little or no powdery mildew in contrast to untreated plants which were covered with powdery mildew.

    ______________________________________                                                             % Control Cucumber                                                             Powdery Mildew in a                                        Compounds           Preventive Test                                            ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                                          100                                                        methyl)phenyl]-N-[2,4-di-                                                      nitro-6-(trifluoromethyl)-                                                     phenyl]-3-nitro-2-pyridine-                                                    sulfenamide                                                                    N-[2-chloro-5-(trifluoro-                                                                           60                                                        methyl)phenyl]-N-(2,4-di-                                                      nitro-6-(trifluoromethyl)phenyl-                                               2-benzothiazolesulfenamide                                                     ______________________________________                                    

EXAMPLE 17

Compounds of this invention are dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 20 ppm in purified water containing 25 ppm of the surfactant Alkanol® XC (sodium alkyl naphthalene sulfonate). This suspension is sprayed to the point of run-off on cucumber seedlings. The following day, 1/2 inch of simulated rainfall is applied to the foliage of the plants. When the foliage is dry, the plants are inoculated with a spore suspension of the fungus Erysiphe cichoracearum and incubated in a growth room for 7 days. Disease ratings are then made. As shown in the following table, the compounds of this invention provided excellent disease control, as treated plants had little powdery mildew in contrast to untreated plants which were covered with powdery mildew.

    ______________________________________                                                           % Control Cucumber                                                             Powdery Mildew in a                                          Compounds         Residual Wash-Off Test                                       ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                                        90                                                           methyl)phenyl]-N-[2,4-di-                                                      nitro-6-(trifluoromethyl)-                                                     phenyl]-3-nitro-2-pyridine-                                                    sulfenamide                                                                    N-[2-chloro-5-(trifluoro-                                                                        68                                                           methyl)phenyl]-N-[2,4-di-                                                      nitro-6-(trifluoromethyl)-                                                     phenyl]-2-benzothiazole-                                                       sulfenamide                                                                    ______________________________________                                    

EXAMPLE 18

Compounds of this invention are dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 20 ppm in purified water containing 25 ppm of the surfactant Alkanol® XC (sodium alkyl naphthalene sulfonate). This suspension is sprayed to the point of run-off in cucumber seedlings. When the foliage is dry, the plants are exposed to 3500 foot candles of light from a xenon arc source for a period of 16 hours. This light source approximates the spectrum of natural sunlight, and is used to assess photostability of the compounds of this invention on plant foliage. The following day, the plants are inoculated with a spore suspension of the fungus Erysiphe cichoracearum and incubated in a growth room for 7 days. Disease ratings are then made. As shown in the following table, a compound of this invention provided excellent disease control, as treated plants had little powdery mildew in contrast to untreated plants which were covered with powdery mildew.

    ______________________________________                                                           % Control Cucumber                                                             Powdery Mildew in a                                          Compounds         Photostability Test                                          ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                                        94                                                           methyl)phenyl]-N-[2,4-di-                                                      nitro-6-(trifluoromethyl)-                                                     phenyl]-3-nitro-2-pyri-                                                        dinesulfenamide                                                                N-[2-chloro-5-(trifluoro-                                                                        15                                                           methyl)phenyl]-N-[2,4-di-                                                      nitro-6-(trifluoromethyl)-                                                     phenyl]-2-benzothiazole-                                                       sulfenamide                                                                    ______________________________________                                    

EXAMPLE 19

Compounds of this invention were dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 20 ppm in purified water containing 25 ppm of the surfactant Alkanol® XC (sodium alkyl naphthalene sulfonate). This suspension is sprayed to the point of run-off on wheat seedlings. The following day, the plants are inoculated with a spore suspension of Puccinia graminis var. tritici and incubated in a saturated humidity chamber at 20° C. for 24 hours and then in a growth room for an additional 7 days, when disease ratings were made. As shown in the following table, the compounds of this invention provided excellent disease control. Treated plants had few rust pustules while the untreated plants had numerous rust pustules on each leaf.

    ______________________________________                                                           % Control Wheat Rust                                         Compounds         in a Preventive Test                                         ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                                        80                                                           methyl)phenyl]-N-[2,4-di-                                                      nitro-6-(trifluoromethyl)-                                                     phenyl]-3-nitro-2-pyridine-                                                    sulfenamide                                                                    N-[2-chloro-5-(trifluoro-                                                                        97                                                           methyl)phenyl]-N-[2,4-di-                                                      nitro-6-(trifluoromethyl)-                                                     phenyl]-2-benzothiazole-                                                       sulfenamide                                                                    ______________________________________                                    

EXAMPLE 20

Compounds of this invention were dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 20 ppm in purified water containing 25 ppm of the surfactant Alkanol® XC (sodium alkyl naphthalene sulfonate). This suspension is sprayed to the point of run-off on wheat seedlings. The following day, 1/2 inch of simulated rainfall is applied to the foliage of the plants. When the foliage is dry, the plants are inoculated with a spore suspension of Puccinia graminis var. tritici and incubated in a saturated humidity chamber at 20° C. for 24 hours and then in a growth room for an additional 7 days, when disease ratings were made. As shown in the following table, the compounds of this invention provided excellent disease control. Treated plants had few rust pustules while the untreated plants had numerous rust pustules on each leaf.

    ______________________________________                                                           % Control Wheat Rust                                                           in a Residual Wash-                                          Compound          off Test                                                     ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                                        98                                                           methyl)phenyl]-N-[2,4-                                                         dinitro-6-(trifluoro-                                                          methyl)phenyl]-3-nitro-                                                        2-pyridinesulfenamide                                                          N-[2-chloro-5-(trifluoro                                                                         85                                                           methyl)phenyl]-N-[2,4-                                                         dinitro-6-(trifluoro-                                                          methyl)phenyl]-2-benzo-                                                        thiazolesulfenamide                                                            ______________________________________                                    

EXAMPLE 21

Compounds of this invention were dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 20 ppm in purified water containing 25 ppm of the surfactant Alkanol® XC (sodium alkyl naphthalene sulfonate). This suspension is sprayed to the point of run-off on wheat seedlings. When the foliage is dry, the plants are exposed to 3500 foot candles of light from a xenon arc source for a period of 16 hours. This light source approximates the spectrum of natural sunlight, and is used to assess photostability of the compounds of this invention on plant foliage. The following day, the plants are inoculated with a spore suspension of Puccinia graminis var. tritici and incubated in a saturated humidity chamber at 20° C. for 24 hours and then in a growth room for an additional 7 days, when disease ratings were made. As shown in the following table, most of the compounds of this invention provided excellent disease control. Treated plants had few rust pustules while the untreated plants had numerous rust pustules on each leaf.

    ______________________________________                                                          % Control Wheat Rust in a                                     Compounds        Photostability Test                                           ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                                       95                                                            methyl)phenyl]-N-[2,4-di-                                                      nitro-6-(trifluoromethyl)-                                                     phenyl]-3-nitro-2-pyri-                                                        dinesulfenamide                                                                N-[2-chloro-5-(trifluoro-                                                                       83                                                            methyl)phenyl]-N-(2,4-di-                                                      nitro-6-(trifluoromethyl)-                                                     phenyl]-2-benzothiazole-                                                       sulfenamide                                                                    ______________________________________                                    

EXAMPLE 22

Compounds of this invention are dissolved in acetone in an amount equal to 6% of the final volume and then suspended at a concentration of 5 ppm in purified water containing 25 ppm of the surfactant Alkanol® XC (sodium alkyl naphthalene sulfonate). This suspension is sprayed to the point of run-off on tomato seedlings. The following day, the plants are inoculated with a spore suspension of the fungus Phytophthora infestans and incubated in a growth room for 4 days. Disease ratings are then made. As shown in the following table, a compound of this invention provided excellent disease control, as treated plants had few late blight lesions in contrast to untreated plants which were covered with lesions. Phytotoxicity in the form of foliar burn was observed on some of the plants in association with disease control.

    ______________________________________                                                           % Control Tomato Late                                                          Blight in a Preventive                                       Compounds         Test                                                         ______________________________________                                         N-[2-chloro-5-(trifluoro-                                                                         70 (B)                                                      methyl)phenyl]-N-[2,4-                                                         dinitro-6-(trifluoro-                                                          methyl)phenyl]-3-nitro-                                                        2-pyridinesulfenamide                                                          N-[2-chloro-5-(trifluoro-                                                                         0                                                           methyl)phenyl]-N-[2,4-                                                         dinitro-6-(trifluoro-                                                          methyl)phenyl]-2-                                                              benzothiazolesulfenamide                                                       ______________________________________                                          *B = burn                                                                 

What is claimed is:
 1. A compound of the formula ##STR109## wherein R₁, R₃, and R₄ are independently H, F, Cl, Br, NO₂, CF₃, OCF₂ H, OCF₃, OCF₂ CF₂ H or S(O)_(k) R₈ ; or R₃ and R₄ can be taken together to form --OCF₂ O-- or --OCF₂ OCF₂ --;R₂ is H, F, Cl, Br, NO₂, CF₃ or S(O)_(k) R⁸ ; R₈ is C₁ -C₂ alkyl or C₁ -C₂ alkyl substituted with 2 to 4 atoms of Cl, F or combinations thereof; k=0, 1 or 2; R₅ is H, Cl, F, Br or NO₂ ; R₆ is H, NO₂, or CF₃ ; R₇ is NO₂ or CF₃ ; Z is ##STR110## where bonding to sulfur is to the heterocyclic portion of Z and X can be bonded to any ring position; X is independently H, F, Cl, Br, NO₂, C₁ -C₄ alkyl, C₁ -C₄ alkyl substituted with 2 to 4 atoms of Cl, F or combinations thereof, C₁ -C₄ alkoxy, C₁ -C₄ alkoxy substituted with 2 to 4 atoms of Cl, F or combinations thereof, CN, or NR₁₀ R₁₁ ; V is H, C₁ -C₄ alkyl F, Cl, Br; n is 1, 2, 3 or 4; t is 1 or 2; R₁₀ and R₁₁ are C₁ -C₄ alkyl;provided that (1) at least two of R₁, R₂, R₃, R₄ and R₅ are hydrogen; (2) no more than two of the substituents R₁, R₂, R₃ and R₄ are simultaneously NO₂ or CF₃ ; (3) when two NO₂ or two S(O)_(k) R₈ groups are present, they are not ortho to one another; (4) R₆ and R₇ are not simultaneously CF₃ ; (5) no more than two of the X substituents are CN, NO₂ or alkoxy;and further provicded that when R₆ is NO₂, then (a) R₁ is H, F or Cl when R₃ is other than H, F or Cl; (b) when R₁ =R₃ =R₅, then R₁, R₃ and R₅ are either H or F; and (c) R₅ is either H or F.
 2. A compound of claim 1 wherein R₁ is F, Cl, Br, CF₃, OCF₂ H, OCF₃, OCF₂ CF₂ H or S(O)_(k) CF₃.
 3. A compound of claim 1 wherein R₂ is H, F, Cl or Br.
 4. A compound of claim 1 wherein R₃ is H, F, Cl, Br or S(O)_(k) CF₃.
 5. A compound of claim 1 wherein R₄ is F, Cl, Br, CF₃, OCF₂ H, OCF₃, OCF₂ CF₂ H or S(O)_(k) CF₃.
 6. A compound of claim 1 wherein R₆ is NO₂.
 7. A compound of claim 1 wherein R₁ and R₄ are independently Cl, CF₃, OCF₂ H, OCF₃, OCF₂ CF₂ H, or S(O)_(k) CF₃.
 8. A compound of claim 1 wherein R₃ is H or S(O)_(k) CF₃.
 9. A compound of claim 1 wherein R₂ and R₅ are H.
 10. A compound of claim 1 wherein R₆ and R₇ are NO₂.
 11. A compound of claim 1 wherein R₁ and R₄ are independently Cl, CF₃, OCF₂ H, OCF₃, OCF₂ CF₂ H or S(O)_(k) CF₃ ;R₃ is H or S(O)_(k) CF₃ ; R₂ and R₅ are H; R₆ and R₇ are NO₂.
 12. A compound of claim 11 wherein Z is ##STR111##
 13. A compound of claim 11 wherein Z is ##STR112##
 14. A compound of claim 11 wherein Z is ##STR113##
 15. A compound of claim 11 wherein Z is ##STR114##
 16. A method for control of mites, insects, fungus, mite eggs or insect eggs which comprises applying to a locus to be protected a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 1. 17. A method for control of mites, insects, fungus, mite eggs or insect eggs which comprises applying to a locus to be protected a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 2. 18. A method for control of mites, insects, fungus, mite eggs or insect eggs which comprises applying to a locus to be protected miticidally, insecticidally, fungicidally, or ovicidally effective amount of a compound of claim
 3. 19. A method for control of mites, insects, fungus, mite eggs or insect eggs which comprises applying to a locus to be protected a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 4. 20. A method for control of mites, insects, fungus, mite eggs or insect eggs which comprises applying to a locus to be protected a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 5. 21. A method for control of mites, insects, fungus, mite eggs or insect eggs which comprises applying to a locus to be protected a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 6. 22. A method for control of mites, insects, fungus, mite eggs or insect eggs which comprises applying to a locus to be protected a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 7. 23. A method for control of mites, insects, fungus, mite eggs or insect eggs which comprises applying to a locus to be protected a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 8. 24. A method for control of mites, insects, fungus, mite eggs or insect eggs which comprises applying to a locus to be protected a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 9. 25. A method for control of mites, insects, fungus, mite eggs or insect eggs which comprises applying to a locus to be protected a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 10. 26. A method for control of mites, insects, fungus, mite eggs or insect eggs which comprises applying to a locus to be protected a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 11. 27. An agricultural composition for use as a miticide, insecticide, fungicide or ovicide comprising a surfactant, diluent or mixture thereof and a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 1. 28. An agricultural composition for use as a miticide, insecticide, fungicide or ovicide comprising a surfactant, diluent or mixture thereof and a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 2. 29. An agricultural composition for use as a miticide, insecticide, fungicide or ovicide comprising a surfactant, diluent or mixture thereof and a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 3. 30. An agricultural composition for use as a miticide, insecticide, fungicide or ovicide comprising a surfactant, diluent or mixture thereof and a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 4. 31. An agricultural composition for use as a miticide, insecticide, fungicide or ovicide comprising a surfactant, diluent or mixture thereof and a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 5. 32. An agricultural composition for use as a miticide, insecticide, fungicide or ovicide comprising a surfactant, diluent or mixture thereof and a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 6. 33. An agricultural composition for use as a miticide, insecticide, fungicide or ovicide comprising a surfactant, diluent or mixture thereof and a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 7. 34. An agricultural composition for use as a miticide, insecticide, fungicide or ovicide comprising a surfactant, diluent or mixture thereof and a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 8. 35. An agricultural composition for use as a miticide, insecticide, fungicide or ovicide comprising a surfactant, diluent or mixture thereof and a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 9. 36. An agricultural composition for use as a miticide, insecticide, fungicide or ovicide comprising a surfactant, diluent or mixture thereof and a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 10. 37. An agricultural composition for use as a miticide, insecticide, fungicide or ovicide comprising a surfactant, diluent or mixture thereof and a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 11. 38. A compound of claim 1 wherein ##STR115##
 39. An agricultural composition for use as a miticide, insecticide, fungicide or ovicide comprising a surfactant, diluent or mixture thereof and a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 38. 40. A method for control of mites, insects, fungus, mite eggs or insect eggs which comprises applying to a locus to be protected a miticidally, insecticidally, fungicidally or ovicidally effective amount of a compound of claim
 38. 